* {
  margin: 0;
  padding: 0;
}
.crumb_wrap a {
  margin-right: 10px;
}
.preview_wrap {
  width: 400px;
  height: 590px;
}
.preview_img {
  height: 398px;
  border: 1px solid #ccc;
}
.mask {
  position: absolute;
  top: 0;
  left: 0;
  width: 300px;
  height: 300px;
  background-color: #fede4f;
  opacity: 0.5;
  border: 1px solid #ccc;
  cursor: move;
}
.preview_list {
  position: relative;
  height: 60px;
  margin-top: 60px;
}
.big {
  position: absolute;
  left: 410px;
  top: 0;
  width: 500px;
  height: 500px;
  background-color: pink;
  z-index: 999;
}
.preview_list {
  position: relative;
  height: 60px;
  margin-top: 60px;
}
